But that doesn't mean they are a better team. If there was an european superleague, we would finish above them every year for the last 7 years without a doubt.
Madrid has this quality that if they are better than the other team, they always win. If the match is close, they win 95% of the time. If they are inferior, they still win 60% of the time. If they are extremely inferior (City 2 years ago, even PSG 2 years ago) they still have a good shot of going through. But they are extremely lucky this is a knock-out competition.